Mini water pump

ABSTRACT

A mini water pump formed of a housing, a top cover, a bottom cover, a motor, a bottom shell, and a wheel. The housing has a stub tube, which supports the motor in position, and a conical flange, which supports the output shaft of the motor against vibration and a gasket ring on the output shaft. The bottom cover has an upright stub tube stopped at the conical flange of the housing at the bottom side for the passing of the output shaft of the motor, a plurality of inside annular flanges disposed in the upright stub tube at different elevations, and a plurality of gasket rings respectively supported on the inside annular flanges and mounted on the output shaft of the motor to seal the gap.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to water pumps and, more particularly, to a mini water pump, which is well sealed against water leakage and, has means to protect the motor against vibration.

[0003] 2. Description of the Related Art

[0004] Mini water pumps are commonly used in aquarium or the like for pumping water through water filter means. However, due to small size, conventional mini water pumps have low pumping power. Furthermore, conventional mini water pumps leak quickly with use because they use only one single gasket to seal the gap between the output shaft of the motor and the shaft hole of the motor housing.

SUMMARY OF THE INVENTION

[0005] The present invention has been accomplished to provide a mini water pump, which eliminates the aforesaid drawbacks. It is one object of the present invention to provide a mini water pump, which achieves high pumping work. It is another object of the present invention to provide a mini water pump, which protects the output shaft of the motor against vibration during rotation. It is still another object of the present invention to provide a mini water pump, which effectively prohibits water leakage. According to one aspect of the present invention, the mini water pump is comprised of a housing, a top cover, a bottom cover, a motor, a bottom shell, and a wheel. The housing has a stub tube, which supports the motor in position, and a conical flange, which supports the output shaft of the motor against vibration and a gasket ring on the output shaft. The bottom cover has an upright stub tube stopped at the conical flange of the housing at the bottom side for the passing of the output shaft of the motor, a plurality of inside annular flanges disposed in the upright stub tube at different elevations, and a plurality of gasket rings respectively supported on the inside annular flanges and mounted on the output shaft of the motor to seal the gap. According to another aspect of the present invention, the bottom shell has a plurality of water inlets in the bottom side, two water outlets in the periphery at two sides, and two output pipes respectively extended from the water outlets. The wheel has a plurality of blades radially spirally integral with the bottom sidewall thereof for driving water from the water inlets to the water outlets of the bottom shell efficiently upon rotation motion of the output shaft of the motor.

BRIEF DESCRIPTION OF THE DRAWINGS

[0006]FIG. 1 is an exploded view of a mini water pump according to the present invention.

[0007]FIG. 2 is a sectional assembly view of the mini water pump according to the present invention.

[0008]FIG. 3 is a bottom view of the mini water pump according to the present invention.

[0009]FIG. 4 shows a main pipe connected to the output pipes of the bottom shell through two connecting pipes and a Y-shaped water pipe connector according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0010] Referring to FIGS. from 1 through 3, a mini water pump in accordance with the present invention is shown comprising a motor M having an output shaft 1, a housing 10 having a bottom mounting base 101, a top cover 13 having a peripheral bottom mounting flange 14, a bottom cover 16 having a bottom mounting flange 160 and a top coupling chamber 17, a wheel 20 having radially arranged bottom spiral blades 21, and a bottom shell 30 having water inlets 32 and water outlets 33 and output pipes 34 extended from the water outlets 33. The motor M is mounted in the housing 10. The peripheral bottom mounting flange 14 of the top cover 13 is fastened to the top open side of the housing 10, and then sealed with glue. The top cover 13 has a downwardly protruded part forced into engagement with an upwardly protruded part of the motor M when covered on the housing 10. Therefore, the top cover 13 holds the motor M firmly in position inside the housing 10. The bottom cover 16 is covered on the bottom side of the housing 10 by forcing the bottom mounting base 101 into engagement with the top coupling chamber 17 and then sealing the connection area with glue. The wheel 20 is coupled to the output shaft 1 of the motor M and suspended below the bottom cover 16. The bottom shell 30 is coupled to the bottom mounting flange 160 of the bottom cover 16 around the wheel 20 and sealed with glue, defining a water accumulation chamber.

[0011] Referring to FIGS. from 1 through 3 again, the housing 10 comprises a stub tube 11 upwardly protruded from the center of the top of the bottom mounting base 11 for supporting the motor M in position, a conical flange 120 downwardly suspended in the stub tube 11, and a center through hole 12 through the center of the conical flange 120 for the passing of the output shaft 1. The bottom cover 16 further comprises an upright stub tube 18 disposed at the center inside the top coupling chamber 17 for supporting the conical flange 120 of the housing 10 and for the passing of the output shaft 1 of the motor M, and a plurality of inside annular flanges 19 disposed in the upright stub tube 18 at different elevations. During assembly process, gasket rings 2 are respectively mounted on the output shaft 1 and supported on the conical flange 120 of the housing 10, the inside annular flanges 19 of the bottom cover 16 and the top sidewall of the wheel 20 to seal the gap and to prohibit vibration of the output shaft 1 of the motor M during running of the motor M. Further, the bottom blades 21 are formed integral with the bottom sidewall of the wheel 20 to simplify the fabrication and to reduce the manufacturing cost.

[0012] Referring to FIG. 3 again, when the motor M started, the bottom blades 21 are rotated with the wheel 20 inside the bottom shell 30 to drive water from the water inlets 32 to the water outlets 33 and the output pipes 34.

[0013] Referring to FIG. 4, the two output pipes 34 of the bottom shell 30 are respectively connected to a main pipe 37 through two connecting pipes 35 and a Y-shaped water pipe connector 36, enabling output water to be delivered to the main pipe 37.

[0014] A prototype of mini water pump has been constructed with the features of FIGS. 1˜4. The mini water pump functions smoothly to provide all of the features discussed earlier.

[0015] It is to be understood that the drawings are designed for purposes of illustration only, and are not intended for use as a definition of the limits and scope of the invention disclosed 

What the invention claimed is:
 1. A mini water pump comprising: a housing, said housing having a top open side and having a bottom mounting base; a top cover covering the top open side of said housing; a bottom cover coupled to the bottom mounting base of said housing; a motor mounted in said housing, said motor having an output shaft extended out of said bottom mounting base of said housing and said bottom cover; a bottom shell coupled to said bottom cover and defining with said bottom cover a water accumulation chamber, said bottom shell having at least one bottom water inlet and at least one peripheral water outlet; and a wheel coupled to the output shaft of said motor and suspended in said water accumulation chamber for synchronous rotation with said motor to drive water from said at least one water inlet toward said at least one water outlet; wherein said housing comprises a stub tube upwardly protruded from the center of said bottom mounting base for supporting said motor in position, a conical flange downwardly suspended in said stub tube, a center through hole through said conical flange for the passing of the output shaft of said motor, and a gasket ring supported on said conical flange around the output shaft of said motor; said bottom cover comprises a top coupling chamber coupled to the bottom mounting base of said housing, an upright stub tube disposed at the center inside said top coupling chamber and stopped at the conical flange of said housing for the passing of the output shaft of said motor, a plurality of inside annular flanges disposed in said upright stub tube at different elevations, and a plurality of gasket rings respectively supported on said inside annular flanges and mounted on the output shaft of said motor; said bottom shell comprises two water outlets disposed in the periphery thereof at two sides, and two output pipes respectively extended from the water outlets for output of water; said wheel comprises a plurality of blades spirally radially formed integral with a bottom sidewall thereof. 